<template>
  <div class="app-container">
    <!--表单-->
    <el-form :inline="true" class="demo-form-inline">

      <el-form-item>
        <el-select v-model="searchObj.type" clearable placeholder="请选择">
          <el-option label="学员登录数统计" value="login_num" />
          <el-option label="学员注册数统计" value="register_num" />
          <el-option label="课程播放数统计" value="video_view_num" />
          <el-option label="每日课程数统计" value="course_num" />
        </el-select>
      </el-form-item>

      <el-form-item>
        <el-date-picker v-model="searchObj.begin" type="date" placeholder="选择开始日期" value-format="yyyy-MM-dd" />
      </el-form-item>
      <el-form-item>
        <el-date-picker v-model="searchObj.end" type="date" placeholder="选择截止日期" value-format="yyyy-MM-dd" />
      </el-form-item>
      <el-button :disabled="btnDisabled" type="primary" icon="el-icon-search" @click="showChart()">查询</el-button>
    </el-form>

    <div class="chart-container">
      <div id="chart" class="chart" style="height:500px;width:100%" />
    </div>
  </div>
</template>
<script>
  import echarts from "echarts";
  import sta from '@/api/sta';
  export default {
    data() {
      return {
        searchObj: {
          type: "",
          begin: "",
          end: ""
        },
        btnDisabled: false,
        xData: [],
        yData: []
      };
    },
    created() { },
    methods: {
      showChart() {
        sta.getStaDaily(this.searchObj).then(res => {
          this.xData = res.data.dateCalculatedList;
          this.yData = res.data.dataList;
          // console.log(this.xData);
          this.initChart();
        })
      },
      initChart() {
        // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById("chart"));

        // 指定图表的配置项和数据
        var option = {
          //x轴是类目轴（离散数据）,必须通过data设置类目数据
          xAxis: {
            type: "category",
            data: this.xData
          },
          //y轴是数据轴（连续数据）
          yAxis: {
            type: "value"
          },
          //系列列表。每个系列通过 type 决定自己的图表类型
          series: [
            {
              //系列中的数据内容数组
              data: this.yData,
              //折线图
              type: "line"
            }
          ],
          //x坐标轴触发提示
          tooltip: {
            trigger: "axis"
          },
          //区域缩放
          dataZoom: [
            {
              show: true,
              height: 30,
              xAxisIndex: [0],
              bottom: 30,
              start: 10,
              end: 80,
              handleIcon:
                "path://M306.1,413c0,2.2-1.8,4-4,4h-59.8c-2.2,0-4-1.8-4-4V200.8c0-2.2,1.8-4,4-4h59.8c2.2,0,4,1.8,4,4V413z",
              handleSize: "110%",
              handleStyle: {
                color: "#d3dee5"
              },
              textStyle: {
                color: "#fff"
              },
              borderColor: "#90979c"
            },
            {
              type: "inside",
              show: true,
              height: 15,
              start: 1,
              end: 35
            }
          ]


        };

        // 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
      }
    }
  };
</script>